Precision sickle sharpener



Nov. 29, 1949 F. H. sHADLE 2,489,335

PRECIS ION SICKLE SHARPENER Floyd H. Shad/e By afm/yawn; ,5mm

Nov. 29, 1949 F. H. sHADLE 2,489,335

PRECISION SICKLE SHARPENER Filed June 4, 1947 4 sheets-sheet 2 I n ventor Floyd H. Shad/e aan/#wfg M@ Nov. 29, 1949 F. H. sHADLE PRECISION SICKLE SHARPENER 4 Sheets-Sheet 3 Filed June 4, 1947 Inventor Floyd H. Shad/e Nov. 29, 1949 F. H. sHADLE 2,489,335

PRECISION' SICKLE SHARPENER K Filed June 4, 1947 4 Sheets-Sheet 4 I nventar Flyd H. Shad/e Patented Nov. 29, 1949 UNITED PATENT zafra-,335I

BREcIsIoNisrcKLE SHARPENER Fidia n: siidr'eivtnafare; Nebr.

Applicationi Ju'ncfit;` 1947;` Serial752g381 acl'ai'ms (c1. sil-56) This inventionrelates to novel.aniilzuseful.im-iv provements in devices for treating, preferably" sharpening, tools.

Anvobjectof this inventionisto providefa stand@ l having an improved support. meanszthereonw for., a sickle bar and means for actuating said'support: means in a predetermined.steppedsequencen Another object of this inventiOnis tio-provide means on said stand for grinding or otherwise sharpening the selected cutting edges of a sickle bar.

A further purpose of this invention is to -provide means for resil'iently biasing the cutter meansf. in a predetermined selected direction. A

A further purpose oi this invention is itofp'ovide means for pivotally adjusting the'. cutter` means for the purpose of treating oppseclsufaces of the conventional sickle'l'ai" teeth.

Another' objectof this inventionresi'd's nthe. provision o means for selectively4 raisi1'g`-ndlvv`- ering the cutting means at predetermined 'tffvals during the cycle'of operation f theivto'i.

Stillanother purposeY of this invention resides` in the pivotedn'atur'e of tle said 's'ckl lifarfsi'l' port means, whereby opposed andop telyfr- 25.1 clined' teeth surfaces of a, conv'r'itionals'iclile'bar" may be Vreadily and' easily; treate'd Another object of this invention ist"o"prov`id` meansv for retaining the sickle'barsupportrars and means for retaining th'emuttin'gr gindgf 30 means in selected adjusted' positions;

Other objects *and `features of novelty shallh'efl come apparenty to those* skilled in"tleart, i'rrfl-r lowing lthe 'descriptionofv the-preferred :eml'jd f' ment of the present'invention, illustratedinthe35* accompanying drawings; wherein-1 Figure 1 is an elevational side View ofthe-pr# ferred embodiment ofthe presentinventiom" Figure 2 is a plan view ofthe inventiorifdi's-f closed in Figure 1;

Figure 3 is an elevational front ViewV ofthel ven-tion disclosed in Figurer;

Figure 4 is an enlarged elevational"view'di ciosing details of the adjustable' and pvotedicutr ting means;

Figure 5 is an enlarged elevational viw offf'f clamp utilized in conjunctiony with thevprt-isentA invention, and;

Figure 6 is a transverse sectional view' ofthe" 5aV longitudinal sickle retaining member taken subi' stantially on the line 5 8 of Figure 2`ar'1d" i the' direction of the arrows.

Referring now in detail to the illustratedpreferred embodiment of the present invention-,i like 515,

, 2vA referencey characters are. ed throughoutzto --ridisw1 cate f similarelementsl thereof.

The `rgeneral purpose :of thefpresent. inventiorxrV f asset forth inv-the objects/thereof may be summedf: upas i allows a sickle bar is retained inV a' zspeciailyv I providedmember andv an index bar.-

clamped.. securely thereon. The:sickleibar.reta-iningf,mem Y' berA ispivoted to a sta-naif the traveltothe-:said:v sickle bar-retaining means being preferably aboutA 1 60". Means; is provided for `movingthe. index han andfconsequentiy the sicllebar in steppedse' I quence after certain treating operations arerper. formedon the teeth of the said bar. Iii-performs ing .the said treating: operations., aY cuttin ggdevicer:` is provided on a carriage whichisslidable. on"A tracks. These tracksv form aipori'jio'r'i.'.of the standl. i The. cutting means is providedin aho'us'ingfand'l the .said housingfis pivotall'y. mounted, calpal.f4` A' a predetermined pivtal'arc frtatin. 1's,,.

cutting means is provided' iii cider' tnat'ii'i dut: ting means willerigage the selectedte'th' ""s' onlyY at predetermineditimes. Of"`crse`p' e'` means is' provided lfor 'rotating the'cutt'rm imei-fiber is veoiiiposai ofY a" ida-irai*siiii'sianiidiivor identical base Yportionsconnectedldyineaxis oft r. c rods: 22: If desired; addition-"arstrengthen members' may be' supplied Iongitudira'lif`of said" sickle bar retainingmeansA 20'VJ 'such' as anglei' 't braces''. A conventional' 'sickle'l'oarl is rece y naildexbar `2`B Whlissituated and gluide in the said member 720.l This bar 28 is l.slaped"" in 'cross section', including a' .l'orizortalllegV which restsonth'e' memler and a vertical'leg'. said index bai 2s" is prbvided with` a pid'faiity; of slots 3`0"'along the longitudinalaxislthereo' on thegtop of the` verticallegfor apurposeetofrjhe set-forth inthe subsequent portion oi .tZ'hespeciidg4 cation.A Support braces` 32 .extend` `from. the .saidl member 26 to the base I2, whereon said support members 32 are pivoted. Any conventional pivot means may be used such as the bolts 34 disclosed in Figure 3. A slot 38 is received in one end of the said index bar 28 for the purpose of receiving the enlargement 38 therethrough, conventionally found in sickle bars. The said slot 36 permits of iiexibility in that various size sickle bars may be utilized in the present invention and still be accommodated in the aperture formed by the said slot 3E. In accordance with the ilexibility of the said slot construction 36, a specially designed clamp has been devised for employment therewith. The usual ball joint 40 extending from the said sickle bar 26 is received in suitable receiving means. The preferable receiving means consists of a pair of circular apertured members 42 which engage the said ball joint member 40. Arms 45 having slots 46 therein extend from the said circular engaging members 42. These arms are xedly secured to a perch 48 extending from the said index bar 28. A screw 50 extends through the said slot 46 and a wing nut, or a conventional equivalent, is engageable with the threads of the screw U. This wing nut 52 is obviously employed in conjunction with the screw for the purpose of retaining the arms 45 and consequently the retaining means 42 against the said ball joint member 40. A second screw 50 and wing nut construction 52 is employed adjacent the circular retaining means 42 to further assure rigid clamping action.

Viewing Figure 2, there is disclosed a resilient clip 54 which is fixed to the said index bar 28 by means of a conventional screw construction. This resilient clip 54 is conventional in structure and is utilized for the purpose of retaining the sickle bar 26 in xed position relative to the index bar 28;'r It is seen that by fastening the said resilient clip 54 to the said index bar 28 the sickle bar will becarried entirely by the index bar 28.

The said member 20 has been described as pivoted to and above the table I4. It is noted that the said pivot pin I6 and pivot 34 are on the same vertical axis, thereby allowing pivotal movement offthe member 20. When the sickle bar retaining member 20 is positioned in one of its selected positions, assume that shown in Figure 2, means for assuring mmovability is provided. This means consists of a link 58 pivoted to the undersurface oi'. the said member 20, and having an aperture 60K., adjacent the end thereof. This aperture is received on a pin 62 which may be resiliently biased from a housing 64, secured to a selected portion of the said table I4. The pin 62 and its associated housing 64 along with the resilient biasing means therein is conventional in nature being Well known in many arts. Of course, when the sickle bar retaining means 20 assumes a position as; shown in phantom in Figure 2, a second link 58,., aperture 60 and pin 62 is utilized for retaining the said member 28 in the desired selected position. The purpose in providing the sickle bar pivoted construction is in order to sharpen all sides of the teeth, pertinent to conventional sickle bars.

A crank 66 is secured to a shaft 68 which is journaled in the said bracket I8. There is also provided a spring 'I0 for the purpose of biasing the crank outwardly relatively to the depending portion of the said bracket I8. This spring is preferably interposed between the crank 66 and the said depending portion of the member IB. A link "I2 is secured to the inward terminal portionv of the shaft 68 and a pawl 14 is pivoted thereto. This pawl i4 engages the aforementioned slots 30 which are in selected spaced positions along the longitudinal axis of the index bar 28. Obviously, the handle 66 may be rotated in reversing the action thereby moving the index bar and consequently the sickle bar 26 predetermined selected amounts. Of course, these amounts correspond with the distance between teeth. Also, it is noted that the pawl 'I4 may be turned to a position opposite that shown in Figure 3 and the index bar 28 consequently reversed in its direction of movement.

Upon rotation of the crank 65, the pawl 'I4 resting on the vertical leg of the index bar 28 is slid an amount corresponding to the size of the crank throw. Further, the movement of the pawl, due to its pivotal connection with the crank mechanism, will be sliding movement on the bar 28. By engagement of the pawl in the successive slots upon rotation of the crank, the bar 28 is moved progressively.

A pair of tracks I8 and 80 respectively are secured to the said stand I0 by any suitable means, preferably by utility of a plate 82 extending across said stand I0. Of course, the tracks 'IS and 86 may be secured thereto by any suitable conventional means such as bolts and the like. A carriage is slidably received on the said rails 'I8 and 88. This carriage carries a means for treating the teeth of a conventional sickle bar in order to sharpen or otherwise adjust the same. The said carriage consists of a pair of substantially parallel members 84 and 86 respectively connected by suitable cross members 88 and 90 respectively. The member 98 is preferably a wooden block having suitable apertures adjacent the extremities thereof for receiving the said parallel track members I8 and 80 respectively therethrough. The member 88 may extend across said tracks I8 and 80 and engage the same forming a bearing surface. A second block 92 is secured to the said block 98 and a guard 94 depends therefrom. Straps 96 may be employed in a conventional manner to retain the guards in theselected, desired position movable with the said carriage.

A bracket 98 is received on the front portion of the said blocks and 92 and a cross member IUD extends substantially perpendicular thereto.

Means for pivotally and adjustably retaining a cutting element is provided in association with the carriage and more speciiically the last mentioned bracket 98. For a detail of this construction, reference is made to Figure 4. Slotted and apertured members IIJ2 and Iil respectively are adjustably received on the said cross member H10 by means of a conventional bolt H35 extending through the slots in the said slotted member. A housing IDB is provided with a right angular extension IIB, which extends through a suitable aperture in the said block 92 and a suitable aperture in the brace or bracket member 98. This construction obviously permits of pivotal movement about the right angular extension H0 as an axis. A sleeve like housing H2 is received in a suitable bore provided in the said housing Hi8 and antifriction bearings I I4 are provided at each end of the said sleeve like member H. A cap IIB is provided on the upper portion of the said member I I2 for the purpose of retaining the antifriction bearing I I4 in the desired relative position and for a purpose to be subsequently set forth.

1A shaft II8 is received through the said sleeve like member ||2 and a conventional thrust bearing, adjustable in nature, is supplied on the said shaft |8. Thisthrust bearing |20 is preferably in the form of a collar having a suitable set screw therein. The lower portion of the shaft ||8car ries a conventional grinding stone or other abrading means |22. `Washers `|24 and |26 respectively may be utilized as well as the screw |28 in retaining the said abrading means |22 xed to the said shaft I8 yet permitting of replacement when so desired. The opposite end of the said shaft ||8 has an anti-friction bearing |30 associated therewith and a cage |32 journaled thereon. Brackets |34 extend from the cage |32 and a handle member |36 is pivoted thereto. This handle member has a rod |38 pivoted to a selected end, which rod terminates in immovable xed relation on the said housing |08. Any suitable securing means may beutilized as welding, brasing or the like. The cap ||6 has an extension |40 projecting therefrom and a shaft |42 secured thereto. This shaft is received in a suitable bore in the housing |08 and a resilient biasing means, preferably a spring, is interposed between the extension |40 and a selected portion of the housing |08. It may be seen now that upon actuation of the handle member |36, the inner sleeve like housing ||2 will be projected upwardly or downwardly in accordance with the movement of the said handle member |36. Also, the resilient biasing means, or spring |43 urges the stone or abrading means |22 in a selected, predetermined direction. An arm |45 is secured to the terminal portion of the said extension by any suitable conventional means such as the nut |46 cooperating with threads on the said extension ||0. Obviously, a washer may be interposed between the arm |45 and the plate 98 to assist in smoothness of operation. The housing |50 may be secured to or formed integral with the said arm |45 and a spring loaded pin |52 supplied therein. This spring loaded pin is adapted to engage selected apertures in the said apertured arms |82 and |04 respectively. It may be readily appreciated that the said abrading means |22 along with its associated mechanism may be positioned selectively about adjusted pivoted positionsconsidering the axis of the extension ||0 as an axis of rotation. u

From the construction of the structure described above,it may now be readily appreciated further that .selected surfaces of the teeth of a conventional sickle bar may be treated independently. Further, the sickle bar teeth may be treated from two positions, that is while the bar is moving in either direction parallel to the longitudinal axis thereof.

The power, supply means may be secured to or positioned adjacent the stand I0. The preferable source of power is a conventional motor |60 having a suitable bracket |62 for retaining the same in the desired fixed position. A pulley and belt construction may be employed for motivating the.

said abrading means |22. The shaft |64 is secured to and extends from the said stand I0 and a support means or pair of brackets |66 extends from the said base |2. The said shaft |64 may be detachably secured to the said stand I8 by utility of the plate |68 and bolt construction |12 as disclosed in Figure 1. A pulley cluster |14 is employed for attaining selected speeds of rotation of the said shaft I8. This cluster may be keyed or otherwise slidably secured to the shaft |64. Conventional pulley and belt construction |16 about a selected pulley in-the said cluster |14. It may Ibe seen that upon movement of the carriage, the said cluster |14 which is keyed or otherwise equivalently secured to the shaft |64 will be capable of sliding about the longitudinal axis .of

Means for actuating this carriage; longitudinally of the said tracks 18.'and 80respectively is provided; This means .consists of an;

extension |92 rigidly secured to a selected track 18 and an operating lever 94 pivoted thereto. Y A pitman |96is secured to a selected terminal said shaft.

portion of the said lever |94 and to a bracket |98 which is Iixedly received on the said block 90. It 1. is readily apparent that upon pivotal movement` of the said actuating lever |94 the carriage willv be moved longitudinally of the tracks 18 and 8l.`4

Also, means for resiliently retaining the said carriage is provided. This means consists of an arm |99 rigidly xed to a selected track 84 and de-.=; pending therefrom. A pitman 200 is secured to'- the said depending arm |99 and a spring or other' f suitable equivalent, 202 is received at the other. end of the said pitman 200. The opposite portion of the spring 202 is anchored to a selected porinvention, capable of performing all of the speciiically mentioned objects, as well as numerous ancillary objects, it is apparent to those skilled in the art that. various changes including omissions and additions may be made herein without de'- parting from the spirit of -the invention. Ac-

cordingly, limitationY is sought only in accord. ance vwith the scope of the following claims.

Having described the invention, what is claimed. as new is: v

1. A tool grinding device comprising a stand having tracks thereon, a carriage on said tracks,

`means pivoted to said carriage and to one of said tracks for movingsaid carriage longitudinally-of said tracks, cutting means, means ymountedv on'4 said carriage Apivotally supporting said cuttingA means, means attached to said carriage for retaining said cutting means in selected pivotalpositions, means pivoted to said carriage and said cutting means for raising and lowering said cut- -1 ting means, means secured to said stand beneathv said cutting means for supporting a work piece,

means rotatably secured to said support for actuating said work piece support means in stepped.

Sequence.

2. A tool grinding device comprising a stand having tracks thereon, a carriageon said tracks, means pivoted to said carriage and one of said tracks for moving said carriage longitudinally of said tracks, cutting means, means mounted on said carriage` pivotally supportingsald cutting means thereon, means attached to said carriagel for retaining said cutting means in selected-w pivotal positions, means pivoted to said carriage said-@cutting means. Jmeans securedxtosaid stand beneath-:saidxcutting means-fior supporting alwork piece, :means .-secmzed` tosaid :support for actuating said '-.work piece 'support :means in :stepped sequence, Asaid.' work piece supporting 'means .including a Ilongitudinai fmem'ber fpuoted" :to said stand :andA movable. in .-a .plane parallel to fthe-f planey or. said Vtracks, .anindex `iba-r, '-means: -ffor detachably- :securing a iWork -piece to the index baia-andk :means :mountedon-said find'ex' fbar fiori resiliently-biasing.the` .wonkfpieceito said longitu dinalxmember;

8'.. ittool- :grinding :device :comprising -a -stand hasnng-.parallel-,tcacks thereon-.a carrie/geen said traoks, means fpiuoted tto. said carriage andmne of.` said stracks i'or :moving said carriageI 'longitudinally :of: said. tracks', `cutting means, meansmuunted :on said carriage `pivo'tally' supporting saidputting :meanspmeans attached to said icarriegeiomretaining saidzouttingfmeans-in selected piwted rfpositions, imeans :pivoted to said: carriage andV said .outtingimeans for -raising and 1lowering saideeutting mea-ns, means secured :to fsalidsta-nd beneath :said :cutting means zfor supporting -a Wonk piece, means aotatively secured. to said support eior-aetuatingasaid `won-k-piecefsu-ppor-l', means in astepped .-sequence, said work piece supporting means4 including' :a 'longitudinal meinberpivoted' tofsaidzstand, an .index bar,y means sfor tdetacha-bly securing. Aa storieV piece to `,the l'index- -ban means fon-resiliently urgingfa work -piece against said loiiigitudinal-- member', said work lpiece. support actuating means-:including ashaft journal-ledV` in .anLd-saidi-cuttmg means-.ifor'raising-andsiowermg said.1stend @ndt-having. .-a -pawl .pivoted' thereto,-

slots-iin said index 'par selectively and: :prog-ressively engaged by said pawl upon rotative move-- mentof'fsaid shaft.

4;; A tool .grinding idevice` comprising a stand hau'ingtracks thereon, a carriage-on said track-s, means. .-piroted 'to said .eareriage and one of saidtrarslis- .fior moving-1 said-carriage longitudinally of :said-tracks, cutting means, vmeans:mcmn'ted on saldi .carriage pivot-ally supporting saidcutting means, means-1 attached..-to said carriagey for frei tainingsaid". cutting' 'meansA inselectedpivotalA positions, meanspivoted': to said earniage-and said' cutingrmeansiior raisingand' lowering saisie-cut'- ting means, means secured to said stand beneath said',cutting` means-for-"supporting-a, -ivork' piece, meensmotativelyseeuredtosaid support Afor -aetuat'mgsaid; work .piece .supportY means in stepped sequence, said: stonk; .piece supportingcluding la' longitudinal memberwpivoted fte.y sraici` stand; or incitement, in; a; plane z paralielf ite saidtracks, an index ibar, means tor ldeteslnipiy se.V curing; anouk-piecefto the. indexiar, mea-ns. for;

resiiiently biasing-r the v -work piece; aganistt longitudinal membensaid invitar-lt piece ,support actuating means inciuding a 'journal-led; in

sad1-stand; .a pam-.pivoted to` .said-shaft; slotsin.

said index barselect-incly` andwprognessiifeiy engaged-'.py-,said pawl, a handie for .aetuating'said-I shaft, said carriage moving means includ-ing a. levenpivotedtmsaid tracks, meansp'ivotainz con.l

nectingsaid lever teo-,said .carrie-,geand:meansY @for springsecured icone oirsaid tracks. and to said carriaee,

5.,# `tool srindinef device .comprising a. standhaving -ftracks fthereon, afcarriage-on' sai'd "tracks, a lever pivoted to said stand fand' said-carriage-or moving-said carriage longitudinally-'of said-tracks, cutting means, a -pin'fpos'itioned'iin -sa'id lcarriage :and -secured vto said cutting means for pvotally supporting-said cutting-means1forsvvinging movement'in a-planenormal to said tracks, means attacked to said'cutting-means and said-carriageforV retaining Isaid cutting smeans 4in selected adjusted-t lpositions,-meansior raisingfa-nd-lowering saidout-` ting means, meanson-saidfstand beneath saidcuttingl means -for supporting (a 'work lpiece, means supported by said stand -for actuating said -work piece support `means in stepped sequence, saliti -wor-k vpiece supporting means including a long`itudinal 4member pivoted to ysaid stand, an indexbar, means detachabl-y securing-said index bar tothe -work piece, means for :resilientl-y-fclampingfa- Work piece to-said-'inde-X bar, means-,attached 'to said stand-for loclr'ing said longitudinal 'member in selected-pivoted positions.

fl'. In a :tool grinding fdevice, a stand having -apairof parallel 'tracks thereon, a table 'mountedV beneath said tracks, a carriage slidaloly supported on said tracks, linea-ns attached `to said carriagey by la :pivotal connection for Sliding said carriage in a single directiononlsaidr tracks, :resilient Imeans1v attached to said-carriage Aand `-one o'f -said tracks for returning 'said-:carriaga a grinding fmern'loen. means mounting said grindingamember-.on .said carriage for movement transverse to fthe movement of saidcarriage1andftcnvarcl.saidY table, means; on--said :tabl-e for supporting .alwork piece :beneath said grinding member, said means including. an

tracks .and iournal-led in said carriage pivotal-ly' mounting said y.housing on said-carriage, an axiallymovable shaft mounted in-saidhousing, .a cut-ting member supported at one end of said axially-movD able sha-it, yn'ieans--ior axial-ly actuating said shatt atta-,cnedtheretol ,by a pivotal connection, means.v for supporting .a work piece-piyotally attached to said table and substantially-parallel vto said trac-ks,

index bar, and means pivotally moi/table with said. work .supporting means-ttor .actuating said 4index bar in a plane substantially parallel Ito said tracks.

9,. The combination of- ``claim 8V and a latch support means fior retainingn said Work .support means in a preselected pivoted position.-

10J The -combination of claim 9.a-nd said WorkV support means including a resilient member adapted to .engage the upper surface of awork piece to resiliently urge the work piece vtoa fixed position on .said worksupport means.

A11. Tn .a tool grinding apparatus, a stand which includes av pair A.o tracks and a table positioned substantially parallel to and below said trac-ks, a carriage slidably supported on. said tracks,l a housing, means substantially parallel to said tracks .and iournailed in said carriage pvotally-mountingsaid housing on said carriage.,v an axially'movable shaft ymountedin said housing said Workpiece supporting means-including secured to said table and engaging said work.

l-a cutting member carried on one end of said A-axially movable shaft, means for axially actuating said shaft attached thereto by a pivotal connection, means for supporting a work piece pivotally attached to said table and substantially parallel i to said tracks, said Work piece supporting means lincluding an index bar, and means pivotally movable'with said Work supporting means for actuating said index bar in -a plane substantially V`parallel to said tracks, a-spring attached to said --carriage and to one of said tracks for constantly biasing said carriage longitudinally of said tracks, means pivotally attached to said carriage and to one of said tracks for urging said carriage in a direction opposite the urging force of said spring. 12. In a grinding apparatus, a-stand having parallel tracks and a carriage positioned thereon, -ineans pivoted to said carriage and to one of :said tracks for moving said carriage in one di- .--rection on said tracks, resilient means reacting on said carriage and atleast one of said tracks `for returning said carriage, grinding means, -means carried 'by said carriage supporting said .grinding means, a Ftable secured to said stand beneath said tracks, .a longitudinal member piv- .ioted to said table `and ina plane parallel'to said frails, means slidablypositioned on said member :for .supporting a workpiece.

$13. In a grinding apparatus, a stand having 1parallel tracks and a carriage positioned thereon, :means pivoted to .said carriage and to one of said ftracks for moving said carriage in one direction on `said tracks, resilient means reacting on `said carriage and at least one'of said tracks for re- :turning said carriage, grinding means, means :carried by said carriage supporting said grindingmeana a table secured' to said stand beneath @said tracks, a longitudinal member pivoted `to .,:said'table'in aV plane parallel to said railsfmeans ',slidably positioned pon said member for support- .-ing a workpiecasaid grinding means including .a `housing having an `axiallyrslidably shaft se- .-cured thereto, and means pivoted jto said shaft and `said housing r`for axially `-moving said shaft. :14.In .a grinding apparatus, a stand having v.parallel tracks and a carriagepositioned thereon, ,means pivoted to said carriage and -to one of said .tracks for moving `said'carriage in one direction .,onsaid tracks, resilient means reacting on said carriage and-at least oneof said tracks Mfor re- .turning said carriage, grinding means, means carried by saidicarriage supporting said grindingmeans, atable .secured to said stand beneath said ltracks, a longitudinal Amember pivoted 1to said table .and in a plane vparallel .to said rails, means -slidably positioned :on Vsaid member for Supporting -a Work piece, `said-grinding means including a housing .with a .grinding member eupporting shaft therein, `and said -grinding .means .Supporting meanscomprising a pivot pin attached to said housing rand .mounted on said earriage and v.extending parallel .to saidtracks. 15. In a ,grinding .,apparatus, fastand Vhaving parallel tracks and acarriage `positioned thereon, means pivoted to said carriageand to :.one1of said traeks Ifor movingsaid Lcarriage inf-.onedi- Vreeton on said tracks, resilient means reacting von said carriage and at least one rof Said tracks -for returning said carriage, grinding means, means carried by said carriage supporting said igrinding means, a table secured to'saidstand beneath said tracks, a longitudinal member ,pivoted to fsaid table and in a plane parallel to'said rails, fmeans slidably positioned on said member for supporting a Work piece, said grinding meansincluding a housing with a grinding member supporting shaft therein, and said grinding means Aparallel tracks and a carriage positioned thereon, means pivoted to said carriage and to one of said tracks for moving said carriage in one direction on said tracks, resilient means reacting on ysaid carriage and at least o ne of said tracks for returning said carriage, grinding means, means carried by said carriage supporting said grinding means, a table secured to said stand beneath lsaid tracks, a longitudinal member pivoted to Ysaid table and in a plane parallel `to said rails,

a Work supporting index bar mounted for sliding vmovement o n said longitudinal member, and.

means movable pivotally with said longitudinal member for moving said index bar in step-by- `step relation.

17. In a grinding apparatus, a stand having parallel Ktracks and a carriage positioned thereon, vmeans pivoted to said carriageand to one of said tracks for moving s aid carriage in one direc- -tion on said tracks, resilient means reacting ,on ysaid carriage and at least one of said tracks ier returning said carriage, grinding means, means carried by said carriage supporting said grinding means, a table secured to said stand beneath said tracks, allongitudinal member pivotedto said table and in a plane parallel to said rails, a Work sup-porting index bar mounted for sliding move- .ment on said longitudinal member, and means movable pivotally with said longitudinal member 'for moving said index bar in step-by-steprelation, said index b ar being -shaped adapted to seat a work piece on the horizontal leg thereof,

and thevertical leg thereof having spaced slots therein progressively engaged by said index bar moving means.

18. The combination of claim 17 and said index vbar moving means-including a crank having a paWl pivotally mounted at one end thereof and resting on the vertical leg of said index bar.

19.'The combination of claim 17 and latches attached to said table lookingly en gageable with said longitudinal member to retain said member 'in a preselected pivoted position.

. 20. The combination of claim 17 and resiliently v`biased means secured to said longitudinal member and juxtaposed relative to the horizontal leg fof said index bar to urge a Work piece against the horizontal leg of said index bar.k

21. In a grinding apparatus, a stand having Aparallel tracks and a carriage positioned thereon, means pivoted to said carriage and to one Yoi .said tracks for moving said carriage in one .direction on said tracks, resilient means reacting on'said carriage and at least one of said tracks :for returning said carriage, grinding means,

means carried by said carriage supporting said grinding means, a table secured to said stand @beneath said tracks, a longitudinal member pivoted .to said table and in a plane parallel to said rails, means slidably positioned on said member shaft secured thereto, and means pivoted tozsaid shaft and said vhousing ,for axially .moving said shaft, and a spring reacting on said housing and said shaft to resiliently return said shaft after axial movement of said shaft by the aforementioned means.

22.' In a grinding apparatus, a stand having parallel tracks and a carriage positioned .thereon, means pivoted to said carriage and to one of said tracks for moving said carriage in one direction on said tracks, resilient means reacting on said carriage and at least one of said tracks for returning said carriage, grinding means, means carried by said carriage supporting said grinding means, a table secured to said stand beneath said tracks, a longitudinal member pivoted to said table and in a plane parallel to said rails, means slidably positioned on said member for supporting a work piece, said grinding means including a housing having an axially slidable shaft secured thereto, and means pivoted to said shaft and said housing for axially moving said shaft, and a spring reacting on said housing and said shaft to resiliently return said shaft after axial movement of said shaft by the aforementioned means, which includes a link pivoted to said housing and said shaft.

23. A device for grinding a toothed Work piece comprising a stand having a pair of .tracks at the top portion thereof, a horizontal table positioned beneath said tracks and substantially parallel to said tracks, a longitudinal member pivoted 4to said table and movable in a plane substantially parallel to said tracks, an index bar slidably received on said longitudinal member and movable substantially parallel thereto, means pivotally movable with said longitudinal member for moving said index bar in step-by-step relation on said longitudinal member, resilient means attached to said longitudinal member for urging a work piece against said index bar, a latch attached to said table and engaging said member to retain said member in a predetermined pivotal position, a live shaft attached to said stand and having a pulley axially slidable thereon, a carriage slidably supported on said tracks, a countershaft journalled on said carriage having a pulley thereon, grinding means including a housing and an axially slidable shaft therein adapted to retain a grinding element at one end thereof, a pivot pin attached to said housing and mounted in said carriage attaching said grinding means to said carriage for movement therewith, said r last mentioned shaft having a pulley thereon and a flexible driving element entra-ined about said first mentioned, second mentioned and last mentioned pulleys to transmit rotative movement from said live shaft to said axially movable shaft, and manually operative means attached to said .means pivotally movable with said longitudinal member for moving said index bar in step-bystep relation on said longitudinal member, re-

to said stand and having a pulley axially slidable thereon, a carriage slidably supported on said tracks, a countershaft journalied on said carriage having a pulley thereon, grinding means including a housing and an axially slidable shaft therein adapted to retain a grinding element at one end thereof, a pivot pin attached to said housing and mounted in said carriage attaching said grinding means to said carriage for movement therewith, said last mentioned shaft having a pulley thereon and a flexible driving element entrained about said first mentioned, second mentioned and last mentioned pulleys to transmit rotative movement from said live shaft to said axially movable shaft, and manually operative means attached to said housing and pivotally secured to said axially movable shaft for raising and lowering said shaft, an arm attached to said pivot pin and means secured to said arm engaging said carriage for retaining said housing in selected pivoted positions.

25. A device for grinding a toothed Work piece comprising a stand having a pair of tracks at the top portion thereof, a horizontal table positioned beneath said tracks and substantially parallel to said tracks, a longitudinal member pivoted to said table and movable in a plane substantially parallel to said tracks, an index bar slidably received on said longitudinal member and movable substantially parallel thereto, means pivotally movable with said longitudinal member for moving said index bar in step-bystep relation on said longitudinal member, re-

silient means attached to said longitudinal memsilient means attached to said longitudinal member for urging a Work piece against said index bar, a latch attached to said table and engaging said member to retain said member in a predetermined pivotal position, a live shaft attached to said stand and having a pulley axially slidable .-thereon, a carriage slidably supported on said tracks, a countershaft journalled on said carriage having a pulley thereon, grinding means including a housing and an axially slidable shaft therein adapted to retain a grinding element at one end thereof, a pivot pin attached to said housing and mounted in said carriage attaching said grinding means to said carriage for movement therewith, said last mentioned shaft having a pulley thereon and a flexible driving element entraned about said first mentioned, second mentioned and last mentioned pulleys to transmit rotative movement from said live shaft to said axially movable shaft, and manually operative means attached to said housing and pivotally secured to said axially movable shaft for raising and lowering said shaft, a link secured to said carriage and pivoted to one of said tracks for axially sliding said carriage on said rails.

26. The combination of claim 25 and a spring reacting on at least one of said rails and said carriage for returning said carriage.

27. The combination of claim 25 and a spring seated on said housing and reacting on said slidable shaft constantly urging said shaft in a direction away from said table.

28. A tool grinding device comprising a stand having tracks thereon, a carriage disposed on said tracks, means pivoted to said carriage and one of said tracks for moving said carriage longitudinally of said tracks, a shaft, means securing said shaft to said carriage for pivotal movement and for axial movement, cutting means fixed to said shaft, means for releasably locking said shaft in selected pivoted positions, means 13 for axially operating said shaft to raise and lower said cutting means, means disposed on said stand beneath said cutting means for supporting a work piece, and means carried by said stand for moving said work piece supporting means in stepped sequence.

29. A tool grinding device comprising a stand, tracks carried by said stand, a table carried by said stand below said tracks, a carriage movably disposed on said tracks and means pivoted to one of said tracks for moving said carriage longitudinally on said tracks, a housing having a bore, means pivotally mounting said housing at one pair of ends of said tracks, a shaft mounted for axial movement in said bore toward and away from said table and movable pivotally with said housing, a cutting means carried by said shaft, and means for releasably locking said shaft in selected pivoted positions, means operatively connected with said shaft for moving said shaft axially thereby moving said cutting means to- REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,131,999 Denley et al Mar. 16, 1915 FOREIGN PATENTS Number Country Date 518,718 Germany Feb. 19, 1931 

